You can set up a forge project, or just set up the spongeforge project in your workspace, then you can browse the minecraft code in the dependency.
I’m not going to tell you every entity key, but I will say that TARGET
relates to TargetLivingData
and it’s basically if an entity is ‘targeting’ another entity in AI. e.g. a zombie targeting a villager (I think).
ANGER
relates to AngerableData
and is an integer representing how ‘angry’ the entity currently is.
It may be useful for you to explore the org.spongepowered.api.data.manipulator.mutable.entity
package for more entity related data.
I’m guessing this is the same problem as this thread: